Question

After rain, tadpoles were found swimming in a
pond but not frogs. This is due to -
A. lack of pituitary hormones
B. lack of sex hormones
C. lack of thyroxin
D. lack of iodine in water
Select the correct alternative:
(a) A and B
(b) A and C
(c) C and D
and
(d) A, B, C and D​

Answer 1

Answer:

a and c is the correct answer

Answer 2

Answer:

(c) C and D.

lack of thyroxin and lack of iodine in water.